Dear Nattapon,
Please see attached files. As I know, we sold to your company, but ship to CHIN I METAL directly. Then, CHIN I METAL did document that they bought goods from us instead of your company. So they only can transfer for us instead of for your company. The Annex is wrong, I will replace it by Agreegment.
Agreement will show that: we will sell the goods for your company, your company will sell the goods for CHIN I METAL (with details of prices); CHIN I will pay for us, and we will net-off the difference amount. I will sent you the Agreement today.